The Sound Blaster X-Fi Surround 5.1 Pro is an external USB sound card made by Creative Labs that provides high-quality audio output and input for users looking to upgrade their sound experience on a computer. It supports 5.1-channel surround sound and is designed to be used with both desktop and laptop systems, offering improved audio quality over built-in sound solutions.

The Sound Blaster X-Fi Surround 5.1 Pro Windows driver is the software that enables the sound card to work correctly with the operating system. Without the correct driver, the operating system might not recognize the device or may not fully utilize its capabilities, including enhanced audio features like EAX (Environmental Audio Extensions), crystal-clear playback, and input/output capabilities.